If it is flavourless, I would suspect that you have your temperature setting too low. What's happening is that you're hitting the temperature limit and the mod is limiting the power being sent to the
tank. What I have noticed is that with TC mods and nickel
coils, the first hit on a cold coil is the most flavorful and if you start chain
vaping, because the coil doesn't have the time to cool down and you're hitting temp control and the mod is limiting the power to 15 watts or even lower, the flavor starts to get muted, even though the vapor production is still the same.